vcd (version 0.1-3.5)

MSPatients: Diagnosis of Multiple Sclerosis

Description

Data from Westlund & Kurland (1953) on the diagnosis of multiple sclerosis (MS): two samples of patients, one from Winnipeg and one from New Orleans, were each rated by two neurologists (one from each city) in four diagnostic categories.

Usage

data(MSPatients)

format

A 3-dimensional array resulting from cross-tabulating 218 observations on 3 variables. The variables and their levels are as follows:

rll{ No Name Levels 1 New Orleans Neurologist Certain, Probable, Possible, Doubtful 2 Winnipeg Neurologist Certain, Probable, Possible, Doubtful 3 Patients Winnipeg, New Orleans }

source

Michael Friendly (2000), Visualizing Categorical Data: http://hotspur.psych.yorku.ca/ftp/sas/vcd/catdata/msdiag.sas

References

K. B. Westlund & L. T. Kurland (1953), Studies on multiple sclerosis in Winnipeg, Manitoba and New Orleans, Lousiana, American Journal of Hygiene, 57, 380-396.

M. Friendly (2000), Visualizing Categorical Data. SAS Institute, Cary, NC.

Examples

data(MSPatients)

par(mfrow = c(1,2))
agreementplot(t(MSPatients[,,1]), main = "Winnipeg Patients")
agreementplot(t(MSPatients[,,2]), main = "New Orleans Patients")
par(mfrow = c(1,1))